we supply all kinds of blaste furnace tapping hole tools, 

Cross bits H25 thread, 36mm-76mm
X-bit  H25 thread-36-76mm
R32 thread 50mm-89mm
T38 thread 65-89mm
steel bits and TC Bits

also welding button bits diameter:42mm-90mm

also tap hole rod, 2100-6000mm, with any thread contact, R32,R29,B32, T38 etc.